Filter: add floating point support
[lttng-tools.git] / src / lib / lttng-ctl / filter-lexer.l
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1%{
2/*
3 * filter-lexer.l
4 *
5 * LTTng filter lexer
6 *
7 * Copyright 2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * This library is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License, version 2.1 only,
11 * as published by the Free Software Foundation.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 */
18
19#include <stdio.h>
20#include "filter-ast.h"
21#include "filter-parser.h"
22
23extern
24void setstring(struct filter_parser_ctx *parser_ctx, YYSTYPE *lvalp, const char *src);
25
26static void yyunput (int c, register char * yy_bp , yyscan_t yyscanner)
27 __attribute__((unused));
28static int input (yyscan_t yyscanner) __attribute__((unused));
29
30%}
31
32%x comment_ml comment_sl string_lit char_const
33%option reentrant yylineno noyywrap bison-bridge
34%option extra-type="struct filter_parser_ctx *"
35 /* bison-locations */
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36
37D [0-9]
38L [a-zA-Z_]
39H [a-fA-F0-9]
40E ([Ee][+-]?{D}+)
41P ([Pp][+-]?{D}+)
42FS (f|F|l|L)
43IS ((u|U)|(u|U)?(l|L|ll|LL)|(l|L|ll|LL)(u|U))
44
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45INTEGER_SUFFIX [ \n\t]*(U|UL|ULL|LU|LLU|Ul|Ull|lU|llU|u|uL|uLL|Lu|LLu|ul|ull|lu|llu)
46DIGIT [0-9]
47NONDIGIT [a-zA-Z_]
48HEXDIGIT [0-9A-Fa-f]
49OCTALDIGIT [0-7]
50UCHARLOWERCASE \\u{HEXDIGIT}{4}
51UCHARUPPERCASE \\U{HEXDIGIT}{8}
52ID_NONDIGIT {NONDIGIT}|{UCHARLOWERCASE}|{UCHARUPPERCASE}
53IDENTIFIER {ID_NONDIGIT}({ID_NONDIGIT}|{DIGIT})*
54ESCSEQ \\(\'|\"|\?|\\|a|b|f|n|r|t|v|{OCTALDIGIT}{1,3}|u{HEXDIGIT}{4}|U{HEXDIGIT}{8}|x{HEXDIGIT}+)
55%%
56
57 /*
58 * Using start conditions to deal with comments
59 * and strings.
60 */
61
62"/*" BEGIN(comment_ml);
63<comment_ml>[^*\n]* /* eat anything that's not a '*' */
64<comment_ml>"*"+[^*/\n]* /* eat up '*'s not followed by '/'s */
65<comment_ml>\n ++yylineno;
66<comment_ml>"*"+"/" BEGIN(INITIAL);
67
68"//" BEGIN(comment_sl);
69<comment_sl>[^\n]*\n ++yylineno; BEGIN(INITIAL);
70
71L\' BEGIN(char_const); return CHARACTER_CONSTANT_START;
72\' BEGIN(char_const); return CHARACTER_CONSTANT_START;
73<char_const>\' BEGIN(INITIAL); return SQUOTE;
74
75L\" BEGIN(string_lit); return STRING_LITERAL_START;
76\" BEGIN(string_lit); return STRING_LITERAL_START;
77<string_lit>\" BEGIN(INITIAL); return DQUOTE;
78
79<char_const,string_lit>ESCSEQ return ESCSEQ;
80<char_const,string_lit>\n ; /* ignore */
81<char_const,string_lit>. setstring(yyextra, yylval, yytext); return CHAR_STRING_TOKEN;
82
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83
840[xX]{H}+{IS}? setstring(yyextra, yylval, yytext); return HEXADECIMAL_CONSTANT;
850[0-7]*{IS}? setstring(yyextra, yylval, yytext); return OCTAL_CONSTANT;
86[1-9]{D}*{IS}? setstring(yyextra, yylval, yytext); return DECIMAL_CONSTANT;
87
88{D}+{E}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
89{D}*"."{D}+{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
90{D}+"."{D}*{E}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
910[xX]{H}+{P}{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
920[xX]{H}*"."{H}+{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
930[xX]{H}+"."{H}*{P}?{FS}? setstring(yyextra, yylval, yytext); return FLOAT_CONSTANT;
94
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95"[" return LSBRAC;
96"]" return RSBRAC;
97"(" return LPAREN;
98")" return RPAREN;
99"{" return LBRAC;
100"}" return RBRAC;
101"->" return RARROW;
102
103"*" return STAR;
104"+" return PLUS;
105"-" return MINUS;
106
107"%" return MOD_OP;
108"/" return DIV_OP;
109">>" return RIGHT_OP;
110"<<" return LEFT_OP;
111
112"==" return EQ_OP;
113"!=" return NE_OP;
114"<=" return LE_OP;
115">=" return GE_OP;
116"<" return LT_OP;
117">" return GT_OP;
118"&&" return AND_OP;
119"||" return OR_OP;
120"!" return NOT_OP;
121
122":=" return ASSIGN;
123":" return COLON;
124";" return SEMICOLON;
125"..." return DOTDOTDOT;
126"." return DOT;
127"=" return EQUAL;
128"," return COMMA;
129"^" return XOR_BIN;
130"&" return AND_BIN;
131"|" return OR_BIN;
132"~" return NOT_BIN;
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133{IDENTIFIER} printf_debug("<IDENTIFIER %s>\n", yytext); setstring(yyextra, yylval, yytext); return IDENTIFIER;
134[ \t\n]+ ; /* ignore */
135. return ERROR;
136%%
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